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Agglomerated abrasive particles and application thereof

A technology of abrasive grains and nano-grinding, which is applied in the direction of abrasives, grinding tools, and other chemical processes. It can solve the problems of unbalanced processing accuracy and polishing efficiency, and achieve the effects of low processing cost, high polishing efficiency, and high processing accuracy.

Active Publication Date: 2020-07-10
HENAN UNION ABRASIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of agglomerated abrasive grains to solve the problem that the processing accuracy and polishing efficiency cannot be balanced when using small-diameter abrasive grains or large-diameter abrasive grains to make fixed abrasive polishing pads in the prior art

Method used

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  • Agglomerated abrasive particles and application thereof
  • Agglomerated abrasive particles and application thereof
  • Agglomerated abrasive particles and application thereof

Examples

Experimental program
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Embodiment 1

[0031] The agglomerated abrasive grains of this embodiment, specifically diamond round grains, are prepared from nano-diamonds, and are prepared by a method comprising the following steps:

[0032] 1) Take raw materials according to mass percentage: 55% of nano-diamond, 1% of surfactant AY-65 and 44% of silica sol, 100mL in total, add 100mL of deionized water, after mixing, ultrasonically disperse for 30min to obtain a total of 200mL of mixed solution, among which, The particle size of nano-diamond is 20-30nm, the solid content of silica sol is 40%, and the particle size is 10nm;

[0033] 2) Pour the mixed solution obtained in step 1) into a high-speed shear mixer, add 10L of isooctyl alcohol, stir at a speed of 5000r / min for 2 hours, and then separate to obtain a precursor of agglomerated abrasive grains;

[0034] 3) Sintering the precursor of the agglomerated abrasive grains at 550° C. for 2 hours, and then sieving, the average particle size of the obtained agglomerated abra...

Embodiment 2

[0036] The agglomerated abrasive grains of this embodiment, specifically diamond round grains, are prepared from nano-diamonds, and are prepared by a method comprising the following steps:

[0037] 1) Take raw materials according to mass percentage: 45% of nano-diamond, 1% of surfactant AY-65 and 54% of silica sol, 100mL in total, add 100mL of deionized water, mix, and ultrasonically disperse for 30min to obtain a total of 200mL of mixed solution, of which nano The particle size of diamond is 20-30nm, the solid content of silica sol is 40%, and the particle size is 10nm;

[0038] 2) Pour the mixed liquid obtained in step 1) into a high-speed shear mixer, add 10L of isooctyl alcohol, stir at a speed of 5000r / min for 1 hour, and then separate to obtain a precursor of agglomerated abrasive grains;

[0039] 3) Sintering the precursor of the agglomerated abrasive grains at 550° C. for 2 hours, and then sieving, the average particle size of the obtained agglomerated abrasive grains ...

Embodiment 3

[0041] The agglomerated abrasive grains of this embodiment, specifically diamond round grains, are prepared from nano-diamonds, and are prepared by a method comprising the following steps:

[0042] 1) Take raw materials according to mass percentage: 40% nano-diamond, 1% surfactant AY-65 and 59% silica sol, 100mL in total, add 100mL deionized water, mix, and ultrasonically disperse for 30min to obtain a total of 200mL of the mixed solution, of which nano The particle size of diamond is 20-30nm, the solid content of silica sol is 40%, and the particle size is 10nm;

[0043] 2) Pour the mixed liquid obtained in step 1) into a high-speed shear mixer, add 10L of isooctyl alcohol, stir at a speed of 5000r / min for 1 hour, and then separate to obtain a precursor of agglomerated abrasive grains;

[0044] 3) Sintering the precursor of the agglomerated abrasive grains at 650° C. for 3 h, and then sieving, the average diameter of the obtained agglomerated abrasive grains is 1-3 μm.

[00...

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Abstract

The invention belongs to the technical field of grinding materials, and particularly relates to agglomerated abrasive particles and application thereof. The agglomerated abrasive particles are prepared by the following steps: 1) uniformly mixing nano abrasive particles, a surfactant and silica sol to obtain a mixed solution; 2) stirring the mixed solution obtained in the step 1) with a water-binding agent, and separating out an agglomerated abrasive particle precursor; and 3) sintering the agglomerated abrasive particle precursor obtained in the step 2) at 450-750 DEG C for 1-3 h, wherein thesolid content of the silica sol in the step 1) is 35-55%. The silica sol plays a role of a binder, the surfactant can promote bonding among the nano abrasive particles, the water-binding agent can becombined with water in the system so that the silica sol plays a bonding role, and the agglomerated abrasive particles proper in particle size can be obtained by controlling the rotating speed and thestirring time.

Description

technical field [0001] The invention belongs to the technical field of abrasive materials, and in particular relates to agglomerated abrasive grains and applications thereof. Background technique [0002] At present, domestic mobile phone cover glass processing enterprises generally use polished leather or cerium oxide abrasives combined with cerium oxide polishing liquid for polishing in the process of polishing cover glass. As the hardness of mobile phone cover glass becomes higher and higher, the defects of this polishing process become more and more obvious, such as low and unstable processing efficiency, high processing cost, poor flatness, poor surface finish, and low yield. Moreover, the polishing liquid has a short service life, low utilization rate, and high material consumption. In addition, it is difficult to recycle and clean up later, which is easy to cause environmental pollution and is not environmentally friendly. It is a high-energy-consuming processing tech...

Claims

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Application Information

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IPC IPC(8): B24B37/24B24B37/22B24D11/00C09K3/14
CPCB24B37/22B24B37/245B24D11/001C09K3/1409
Inventor 王国微汪静
Owner HENAN UNION ABRASIVES